Nut-lock.



A. H. DE GEOFF 6: A. A. CUMMINGS.

NUT LOOK.

APPLIOATIQN FILED MAR. 21. 1908.

Patented Dec. 1, 1908.

is 6 W.

UNITED STATES PATENT onnroai.

ANDREW H. DE GEOFF AND ANDREW A. CUMMINGS, OF LITTLE GENESEE, NEW YORK.

NUT-LOCK.

Specification of Letters Patent.

Patented Dec., l, 1908.

Application filed March 21, 1908. Serial No. 422,492.

To all whom it may concern:

Be it known that we, ANDREW 11. DE GEOFF and ANDREW A. CUMMINGS, citizens of the United States, residing at Little Genesee, in the county of Allegany and State of New York, have invented certain new and useful Improvements in Nut-Locks, of which the following is a specification.

This invention has for its object a simple, durable and eflicient construction of nut lock, the parts of which are so arranged as to securely hold the nut upon the bolt, against the work, and capable of effectually withstanding jarring and other strains, and the invention consists in certain constructions and arrangements of the parts that we will hereinafter fully describe and claim.

For a full understanding of the invention,

reference is to be had to the following de-- scription and accompanying drawings, in which:

Figure 1 is a side elevation of a nut lock embodying the improvements of our inven tion; Fig. 2 is a longitudinal section thereof; Fig. 3 is a transverse sectional view on the line 3-3 of Fig. 2; Fig. 4 is a sectional View of the nut on the line 44 of Fig. 5; Fig. 5 is an end view of the nut; and, Fig. 6 is a face view of the washer.

Corresponding and like parts are referred to in the following description and indicated in all the views of the drawings by the same reference characters.

Referring to the drawing, the numeral 1 designates a bolt and 2 our improved nut which is interiorly threaded to engage the threads of the bolt. The head 3 of the .nut 2 is polygonal as shown, so as to be readily engaged by a wrench or other tool to turn the nut up against the work, and the outer end of the nut is formed with a plurality of lon gitudinally extending slits 4 forming a series of jaws designed to be sprung into firm engagement with the bolt to prevent the nut from backing off. Preferably the jaws are reamed out as indicated in Fig. 4, in order to secure an increased resiliency. The nut 2 is provided'with exterior threads 5, as shown, said threads terminating short of the head 3 so as to leave an annular smooth portion 6, as clearly illustrated in the drawing. The head 3 is formed contiguous to this smooth portion 6, with an annular recess 7 in which a split spring ring 8 is designed to fit, one end of said spring being securely held in a {notch 9 formed in the head 3, as shown.

1 The said head is also formed near the notch 12 designates a washer which is interiorly threaded to work on the exteriorly threaded portion 5 of the nut 2 and the bore of which is tapered at its outer end as indicated at 13, so as to effectually engage the spring jaws formed by the slits 4 and bind them against the bolt when the washer has been screwed up on the nut. The washer 12 is formed with a serrated face 14 designed for engagement with the outwardly extending latch end 11 of the spring 8 so as to hold the washer in place and to prevent any backing-oil'- of the same after the washer has been screwed up on the nut.

In the practical application or use of our improved nut lock, the nut 2 is screwed up tightly against the work on the bolt 1 and the washer 12 is then screwed up tightly on the nut, which operation compresses the spring tongues of the nut and forces them positively against the threads of the bolt, while the latch end 11 of the spring snaps along the inclined serrations of the face 14 of the washer, while the same 1s being the washer from backing-off and thereby serving to lock the washer and nut securely together with the spring jaws of the latter in firm engagement with the bolt, thereby preventing any accidental unscrewing of either the washer or nut, the nut maybe easily unscrewed whenever desired, by merely pressing the outwardly projecting latch end of the spring towards or into the socket 10, which will free the spring from the serrated face 14 of the washer and permit the washer to be first unscrewed after which, manifestly, the nut also may be backed off.

Having thus described the invention, what is claimedas new is:

1. A nut of the character described, provided with a head, a longitudinally slitted outer end and with exterior threads terminating short of the head, a washer adapted to screw on said threads and compress the slitted end of the nut, and a spring secured between the threads and the head thereof,

outer end, and exterior threads, the head to said nut and normally lying in the space and arranged for locking engagement with the washer.

2. A nut of the character described, provided with a head, and a longitudinally slitted outer end and also provided with ex- :said recess, one end secured in said notch i said spring projecting with said socket, and

terior threads, the head being formed in its I outer face with an annular recess, a washer adapted to screw on the exterior threads of the nut and arranged to compress the slitted end thereof, said washer being formed with a serrated face, and a spring secured at one end within the recess, the other end of said spring being adapted to spring out from the recess into locking engagement with the serrated face of the washer.

3. A nut of the character described, provided with a head, a longitudinally slitted being formed with an annular recess and with a notch and a socket eoninninicating with said recess, a spring ring received in of said spring being and the other end of outwardtx' in rcgistrr a washer adapted to r-ierew on said nut and arranged to compress the slitted end thereof, the washer being formed in one face with serrations designed for engagement by the outwardly projecting end of he spring.

In testimony whereof we atlix our signatures in presence of two witnesses.

ANDREW II, DE ,tJtROFF. LL. ANDREW A. enmures. It. st \Yitnesses:

ELMER t}. l'lr'nniou, RALPH D. HILL. 

